Unless you invest in people, you are not going to see growth in the long term, the medium term, and maybe even the short term.

There will be water and food fights everywhere.

One of the most important things about leadership is that you have to have the kind of humility that will allow you to be coached.

No matter how good you think you are as a leader, my goodness, the people around you will have all kinds of ideas for how you can get better. So for me, the most fundamental thing about leadership is to have the humility to continue to get feedback and to try to get better - because your job is to try to help everybody else get better.

What happens when corn and wheat prices rise is that we see real increases in malnutrition and under-nutrition. And when children are malnourished, their brain development actually slows down and is affected. So this is not just a short-term impact.

Water and sanitation has not had the same kind of champion that global health, and even education, have had.

Today there are a lot places where people say they're just hopeless. If I can come from a hopeless country, get an education, become a hyphenated American and become president of the World Bank, it's my moral duty to make sure that every single person on the planet has that opportunity.